328 lines
8.1 KiB
C++
328 lines
8.1 KiB
C++
#include <STDInclude.hpp>
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#include <proto/rcon.pb.h>
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#include "RCon.hpp"
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#include "Party.hpp"
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namespace Components
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{
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std::unordered_map<std::uint32_t, int> RCon::RateLimit;
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RCon::Container RCon::RconContainer;
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Utils::Cryptography::ECC::Key RCon::RconKey;
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std::string RCon::Password;
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Dvar::Var RCon::RconPassword;
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Dvar::Var RCon::RconLogRequests;
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void RCon::AddCommands()
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{
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Command::Add("rcon", [](Command::Params* params)
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{
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if (params->size() < 2) return;
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const auto* operation = params->get(1);
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if (std::strcmp(operation, "login") == 0)
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{
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if (params->size() < 3) return;
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Password = params->get(2);
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return;
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}
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if (std::strcmp(operation, "logout") == 0)
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{
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Password.clear();
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return;
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}
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auto* addr = reinterpret_cast<Game::netadr_t*>(0xA5EA44);
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if (Password.empty())
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{
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Logger::Print("You need to be logged in and connected to a server!\n");
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}
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Network::Address target(addr);
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if (!target.isValid() || target.getIP().full == 0)
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{
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target = Party::Target();
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}
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if (target.isValid())
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{
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Network::SendCommand(target, "rcon", Password + " " + params->join(1));
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return;
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}
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Logger::Print("You are connected to an invalid server\n");
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});
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Command::Add("remoteCommand", [](Command::Params* params)
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{
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if (params->size() < 2) return;
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RconContainer.command = params->get(1);
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auto* addr = reinterpret_cast<Game::netadr_t*>(0xA5EA44);
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Network::Address target(addr);
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if (!target.isValid() || target.getIP().full == 0)
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{
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target = Party::Target();
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}
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if (target.isValid())
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{
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Network::SendCommand(target, "rconRequest");
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}
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});
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}
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bool RCon::RateLimitCheck(const Network::Address& address, const int time)
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{
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const auto ip = address.getIP();
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if (!RateLimit.contains(ip.full))
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{
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RateLimit[ip.full] = 0;
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}
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const auto lastTime = RateLimit[ip.full];
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// Only one request every 500ms
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if (lastTime && (time - lastTime) < 500)
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{
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return false; // Flooding
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}
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RateLimit[ip.full] = time;
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return true;
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}
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void RCon::RateLimitCleanup(const int time)
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{
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for (auto i = RateLimit.begin(); i != RateLimit.end();)
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{
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// No longer at risk of flooding, remove
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if ((time - i->second) > 500)
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{
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i = RateLimit.erase(i);
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}
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else
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{
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++i;
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}
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}
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}
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RCon::RCon()
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{
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AddCommands();
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if (!Dedicated::IsEnabled())
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{
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Network::OnClientPacket("rconAuthorization", [](const Network::Address& address, [[maybe_unused]] const std::string& data)
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{
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if (RconContainer.command.empty())
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{
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return;
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}
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const auto& key = CryptoKey::Get();
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const auto signedMsg = Utils::Cryptography::ECC::SignMessage(key, data);
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Proto::RCon::Command rconExec;
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rconExec.set_command(RconContainer.command);
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rconExec.set_signature(signedMsg);
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Network::SendCommand(address, "rconExecute", rconExec.SerializeAsString());
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});
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return;
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}
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// Load public key
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static std::uint8_t publicKey[] =
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{
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0x04, 0x01, 0x9D, 0x18, 0x7F, 0x57, 0xD8, 0x95, 0x4C, 0xEE, 0xD0, 0x21,
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0xB5, 0x00, 0x53, 0xEC, 0xEB, 0x54, 0x7C, 0x4C, 0x37, 0x18, 0x53, 0x89,
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0x40, 0x12, 0xF7, 0x08, 0x8D, 0x9A, 0x8D, 0x99, 0x9C, 0x79, 0x79, 0x59,
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0x6E, 0x32, 0x06, 0xEB, 0x49, 0x1E, 0x00, 0x99, 0x71, 0xCB, 0x4A, 0xE1,
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0x90, 0xF1, 0x7C, 0xB7, 0x4D, 0x60, 0x88, 0x0A, 0xB7, 0xF3, 0xD7, 0x0D,
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0x4F, 0x08, 0x13, 0x7C, 0xEB, 0x01, 0xFF, 0x00, 0x32, 0xEE, 0xE6, 0x23,
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0x07, 0xB1, 0xC2, 0x9E, 0x45, 0xD6, 0xD7, 0xBD, 0xED, 0x05, 0x23, 0xB5,
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0xE7, 0x83, 0xEF, 0xD7, 0x8E, 0x36, 0xDC, 0x16, 0x79, 0x74, 0xD1, 0xD5,
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0xBA, 0x2C, 0x4C, 0x28, 0x61, 0x29, 0x5C, 0x49, 0x7D, 0xD4, 0xB6, 0x56,
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0x17, 0x75, 0xF5, 0x2B, 0x58, 0xCD, 0x0D, 0x76, 0x65, 0x10, 0xF7, 0x51,
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0x69, 0x1D, 0xB9, 0x0F, 0x38, 0xF6, 0x53, 0x3B, 0xF7, 0xCE, 0x76, 0x4F,
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0x08
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};
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RconKey.set(std::string(reinterpret_cast<char*>(publicKey), sizeof(publicKey)));
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RconContainer.timestamp = 0;
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Scheduler::Once([]
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{
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RconPassword = Dvar::Register<const char*>("rcon_password", "", Game::DVAR_NONE, "The password for rcon");
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RconLogRequests = Dvar::Register<bool>("rcon_log_requests", false, Game::DVAR_NONE, "Print remote commands in the output log");
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}, Scheduler::Pipeline::MAIN);
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Network::OnClientPacket("rcon", [](const Network::Address& address, [[maybe_unused]] const std::string& data)
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{
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const auto time = Game::Sys_Milliseconds();
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if (!RateLimitCheck(address, time))
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{
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return;
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}
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RateLimitCleanup(time);
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std::string data_ = data;
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Utils::String::Trim(data_);
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const auto pos = data.find_first_of(' ');
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if (pos == std::string::npos)
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{
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Logger::Print(Game::CON_CHANNEL_NETWORK, "Invalid RCon request from {}\n", address.getString());
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return;
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}
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auto password = data.substr(0, pos);
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auto command = data.substr(pos + 1);
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// B3 sends the password inside quotes :S
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if (!password.empty() && password[0] == '"' && password.back() == '"')
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{
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password.pop_back();
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password.erase(password.begin());
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}
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const auto svPassword = RconPassword.get<std::string>();
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if (svPassword.empty())
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{
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Logger::Print(Game::CON_CHANNEL_NETWORK, "RCon request from {} dropped. No password set!\n", address.getString());
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return;
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}
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if (svPassword != password)
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{
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Logger::Print(Game::CON_CHANNEL_NETWORK, "Invalid RCon password sent from {}\n", address.getString());
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return;
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}
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static std::string outputBuffer;
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outputBuffer.clear();
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#ifndef DEBUG
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if (RconLogRequests.get<bool>())
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#endif
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{
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Logger::Print(Game::CON_CHANNEL_NETWORK, "Executing RCon request from {}: {}\n", address.getString(), command);
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}
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Logger::PipeOutput([](const std::string& output)
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{
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outputBuffer.append(output);
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});
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Command::Execute(command, true);
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Logger::PipeOutput(nullptr);
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Network::SendCommand(address, "print", outputBuffer);
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outputBuffer.clear();
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});
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Network::OnClientPacket("rconRequest", [](const Network::Address& address, [[maybe_unused]] const std::string& data)
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{
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RconContainer.address = address;
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RconContainer.challenge = Utils::Cryptography::Rand::GenerateChallenge();
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RconContainer.timestamp = Game::Sys_Milliseconds();
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Network::SendCommand(address, "rconAuthorization", RconContainer.challenge);
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});
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Network::OnClientPacket("rconExecute", [](const Network::Address& address, [[maybe_unused]] const std::string& data)
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{
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if (address != RconContainer.address) return; // Invalid IP
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if (!RconContainer.timestamp || (Game::Sys_Milliseconds() - RconContainer.timestamp) > (1000 * 10)) return; // Timeout
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RconContainer.timestamp = 0;
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Proto::RCon::Command rconExec;
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rconExec.ParseFromString(data);
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if (!Utils::Cryptography::ECC::VerifyMessage(RconKey, RconContainer.challenge, rconExec.signature()))
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{
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return;
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}
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RconContainer.output.clear();
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Logger::PipeOutput([](const std::string& output)
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{
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RconContainer.output.append(output);
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});
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Command::Execute(rconExec.command(), true);
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Logger::PipeOutput(nullptr);
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Network::SendCommand(address, "print", RconContainer.output);
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RconContainer.output.clear();
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});
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}
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bool RCon::CryptoKey::LoadKey(Utils::Cryptography::ECC::Key& key)
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{
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std::string data;
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if (!Utils::IO::ReadFile("./private.key", &data))
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{
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return false;
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}
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key.deserialize(data);
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return key.isValid();
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}
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Utils::Cryptography::ECC::Key RCon::CryptoKey::GenerateKey()
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{
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auto key = Utils::Cryptography::ECC::GenerateKey(512);
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if (!key.isValid())
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{
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throw std::runtime_error("Failed to generate server key!");
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}
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if (!Utils::IO::WriteFile("./private.key", key.serialize()))
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{
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throw std::runtime_error("Failed to write server key!");
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}
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return key;
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}
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Utils::Cryptography::ECC::Key RCon::CryptoKey::LoadOrGenerateKey()
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{
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Utils::Cryptography::ECC::Key key;
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if (LoadKey(key))
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{
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return key;
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}
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return GenerateKey();
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}
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Utils::Cryptography::ECC::Key RCon::CryptoKey::GetKeyInternal()
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{
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auto key = LoadOrGenerateKey();
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Utils::IO::WriteFile("./public.key", key.getPublicKey());
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return key;
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}
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const Utils::Cryptography::ECC::Key& RCon::CryptoKey::Get()
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{
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static auto key = GetKeyInternal();
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return key;
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}
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}
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